1940520697 has 2 divisors, whose sum is σ = 1940520698. Its totient is φ = 1940520696.

The previous prime is 1940520689. The next prime is 1940520707. The reversal of 1940520697 is 7960250491.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1922296336 + 18224361 = 43844^2 + 4269^2 .

It is a cyclic number.

It is not a de Polignac number, because 1940520697 - 2³ = 1940520689 is a prime.

It is not a weakly prime, because it can be changed into another prime (1940520497) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 970260348 + 970260349.

It is an arithmetic number, because the mean of its divisors is an integer number (970260349).

Almost surely, 2^1940520697 is an apocalyptic number.

It is an amenable number.

1940520697 is a deficient number, since it is larger than the sum of its proper divisors (1).

1940520697 is an equidigital number, since it uses as much as digits as its factorization.

1940520697 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 136080, while the sum is 43.

The square root of 1940520697 is about 44051.3416027253. The cubic root of 1940520697 is about 1247.3052769754.

The spelling of 1940520697 in words is "one billion, nine hundred forty million, five hundred twenty thousand, six hundred ninety-seven".